It might have been truth , or maybe at least contained some parts of truth in it . otherwise , how could people of three thousand years ago in a remote area like china - at that time china , america and europe didn t really have contact - so how could they speak about the same thing 那个时代好像就已经有星际战争了，所以星际战争并不完全是虚构的，可能有部分是真实的，否则三千年前像中国那么遥远的地方当时中国和美欧之间并没有实际的接触他们怎么可能讲同样的事情呢？
And we simulate the thing by different spatial frequency hartmann - shack wavefront sensor which is used in detecting the far field of laser beam , and we get the result that if magnitude of wave aberration is lower the dynamic range of sub - aperture of wavefront sensor , the more the spatial frequency of hartmann - shack wavefront sensor is , the more the accuracy of hartmann - shack wavefront sensor in detecting high frequency aberration is 并且波前像差在hartmann - shack波前传感器子孔径动态范围之内，空间分辨率高的hartmann - shack波前传感器对高阶像差波前探测时，其光束质量诊断精度高于空间分辨率低的hartmann - shack波前传感器的光束质量诊断精度。
Based on the relationship between the change of the cornea thickness and optical path length , the ablation profile for the correction of wavefront aberration is presented and simulated on computer . the process of scanning - spot excimer laser is studied and simulated on computer . models for calculation of residual wavefront aberration on situations of lateral decentration and torsional misalignment are brought up 使用改变光程的方法建立起波前像差与角膜切削量之间的关系,并对像差矫正模型进行计算仿真;深入研究了小光斑准分子激光飞点扫描模型,对飞点扫描过程进行计算仿真;提出了中心偏移和旋转情况下剩余像差计算模型,为定量研究切削中心定位精度对像差矫正的影响提供了依据。
The visx star star 4 combines the technologies of customvue wavescan aberrometer , activetrak 3 - d active eye tracking , iris registration , variable spot scanning and variable repetition rate to provide customized wavefront treatment . in the past , standard lasik corrects refractive errors , such as myopia , hyperopia and astigmatism which are so - called low order aberrations 威视visx star 4是结合前波前像差分析仪3d眼球主动追踪系统虹膜定位系统ir iris registration及智慧型超微光斑等技术去提供个人化激光矫视疗程。在过去，标准lasik可解决近视远视及散光等所谓低阶像差问题。
The object of the paper is wavefront aberrometer produced by nanjing university of aeronautics and astronautics and su zhou 66 vision - tech co . , ltd . the principle of aberrometer are detailedly introduced , image processing and automatic track techniques are also researched . according to research result , relevant control software has been developed in this paper , the conceptions of aberration are firstly described , synchronously , image processing and automatic track system are analyzed 论文以南京航空航天大学与苏州六六视觉科技股份有限公司合作研制开发的人眼波前像差仪为研究对象，系统论述了人眼波前像差仪原理，重点对其中的关键技术? ?图像处理与自动跟踪进行了详细研究，并开发出了相应的系统控制软件。
Molten lead and iron boiled in the marble basin of the fountain ; the water ran dry ; the extinguisher tops of the towers vanished like ice before the heat , and trickled down into four rugged wells of flame . great rents and splits branched out in the solid walls , like crystallisation ; stupefied birds wheeled about and dropped into the furnace ; four fierce figures trudged away , east , west , north , and south , along the night - enshrouded 熔化的铅和铁在喷泉的大理石盆里沸腾，烧干了泉水灭烛器似的塔楼尖顶在高温前像冰一样熔化，滴落下来变作了四个奇形怪状的火池坚实的墙壁以结晶的纹样作树枝形迸裂，迸出了巨大的豁口和裂缝。
The excimer laser diopter correction and aberration correction have been proved efficiency and safety . based on cad / cam , applied optics , ophthalmology , biomedicine and computer techonlogy , this paper studied the principle of excimer laser aberration correction . the conception , cause of formation and representation of wavefront aberration are introduced 准分子激光治疗屈光不正及消除像差的有效性和安全性已被证实,本学位论文将cad 、眼科视光学、波前像差技术、生物医学技术与计算机技术等多学科理论交叉结合,系统叙述了人眼波前像差理论,包括波前像差概念、表示方法、测量方法和产生的原因等。
